Răspuns :
a/b = 2/3
(a-400)/(b-400) = 4/5
-----------------------------
a = 2b/3
2b/3 - 400 = 4b/5 - 1600/5
10b - 15*400 = 12b - 4800
-2b = 6000 - 4800 = 1200
b = -600
a = -1200/3 = -400
Am editat ca sa pun minus in fata ultimului 400
(a-400)/(b-400) = 4/5
-----------------------------
a = 2b/3
2b/3 - 400 = 4b/5 - 1600/5
10b - 15*400 = 12b - 4800
-2b = 6000 - 4800 = 1200
b = -600
a = -1200/3 = -400
Am editat ca sa pun minus in fata ultimului 400
a-primul numar
b-al doilea
a/b=2/3
(a+400)/(b-400)=4/5
3a-2b=0
3a-2b=0
5a+2000=4b-1600
5a-4b=-3600
folosind metoda reducerii
-6a+4b=0
5a-4b=-3600
a=3600
b=3600.3/2=5400
b-al doilea
a/b=2/3
(a+400)/(b-400)=4/5
3a-2b=0
3a-2b=0
5a+2000=4b-1600
5a-4b=-3600
folosind metoda reducerii
-6a+4b=0
5a-4b=-3600
a=3600
b=3600.3/2=5400